Oil-well cement-dump bailer



A. E. JOHNSON OIL WELL CEMENT DUMP BAILER Filed May 11,. 1927 Patented 9, 1928. i

nears-e STATES",

PATENT orric ARTHUR E. JOHNSON, OF TAFT, CALIFORNIA.

OIL-WELL CEMENT-Dfi1VIP BAILER.

-, Application filed May 11,

tion of a well cement dump bailer for deep wells, such-as oil wells, in which the cement is conveyed to the bottom of the well by means of. a bucket or column of pipe.

A more specific object is the construction of a bottom dumping bailer whichis provided with a mechanism to cause the bottomto dump when the base of the structure strikes the bottom of the well or other. suitable obstruction such as abridge. c

In constructing my invention I utilize a pipe or a string of piping, and to the base of this piping I attach a bucket having a bottom dumping trap, this trap being held closed by a latch. Slidably mounted on the bucket is i a sleeve and in the lowermost position of such sleeve the latch is locked closed, holding the trap in its closed position. WVhen the sleeve strikes the bottom of the'well or an obstruction, it is forced upwardly, releasing the latch and allowingthe trapv to dump,

Figure 4- is a horizontal section on'the line 4:4 of Fig. 1 looking upwardly in the direction of the arrows.

A. suitable pipe or pipe string is indicated by the numeral 11 and this is connected to a cement bucket, designated generally by the numeral 12, there being a screw threaded coupling 13 between the lower end of the pipe and the upper end of the bucket. The main body of the bucket is of reduced diameter over that of the connection or coupling, as indicated by the parts having the numbers 1 1 and 15. A trap 16 is secured to the open lower end 17 of the bucket by means of a pivot pin 18 connecting ears 19 on the trap with a groove, a recess 23.

. shown in Fig. 1.

: in the well.

1927. Serial No 190,462.

lug 20 which has a screw threaded stem 21 threading in the base of the bucket.

On the outside wall of the bucket, preferably opposite the lug 20, there is a longitudinal groove 22, and at the upper part of this In this groove is fitted a latch 24which has a. head 25 seated in the recess, this being a loose seat and allowing tionof the bucket and operate in slots 31 of the sleeve, this action limiting the movement of the sleeve upwardly and downwardly and the connection being sufficiently loose so that the sleeve normally hangs in the position I On the sideof the sleeve'adacent the latch is an elongated slot 32, this being of sufficient size to allow the latch 24 to project therethi'ough or partly therethrough in the dumping of the bucket, as

vented from movement by the wall of the sleeve 29 when such sleeve is depending in a position as shown in Fig. 1. The pipe 11 in the bucket may then be filled with cement to the desired extent and the whole lowered obstruction such as a bridge, the sleeve is forced upwardly into the position shown in Fig. 2, this sleeve sliding on the studs 30 to shift the latch being due to the cam edge 28 of the trap and the curved surface 27 of the catch portion 26 of the latch. The latch is allowed to swing on the head 25, which fits in the recess 23. Therefore, when the trap is opened, as illustrated in Figs, 2 and 3,

W hen the loweredge of the A I sleeve strikes the bottom of thewell, or some the cement drops by gravity, filling the well as desired. The bucket may then be drawn upwardly and although the sleeve will then drop to the position shown in Fig. l pressing the latch inwardly, the trap 16 Will still be left open and the operation may then be re combination a bucket SQILl-Cillll'Q dunroins 7 v i in trap pivotally mounted within said bucket, a latch shittably mounted on the bucket struc ture to engage the trap, a sleeve slidably mounted on the bucket structure adapted in its lowest position to hold the latch in locking relation to the trap, said sleeve r leasing. the latch in its upper position.

2. A well cementing bucket comprising in combination a bucket structure, a dumping trap pivotally mounted within said bucket, a latch shiftably mounted on the outside surface of the bucket structure, a sleeve slidably mounted on the bucket structure, the sleeve engaging the latch in its lowest positionand retaining the latch to lock the trap closed, the sleeve having an opening to allow movement of the latch when the sleeve slides to an upper position, and hence allow dumpmeans to guide and restrict the movement of the sleeve, the sleeve in its lowest position engaging the back of thelatch whereby the'latch may hold the trap in closed position, said sleeve having an opening to allow outward movement or the latch when in its upper posi tion whereby the trap may bereleased and opened.

4;. A well cementing bracket comprising latch fittin in said roove and havin a catch b D b to hold the trap closed, a sleeve slidably mounted on the bucket, said sleeve in its lower position engaging the back of the latch to prevent its movement from a locking 'position, and in its upper position allowing swinging outwardly of the latch to release the trap.

5. A well cementing bucket comprising in combination a'tubular bucket structure ha ving a pivotally mounted trap at its lower end, there being a longitudinal groove on the outside of the bucket structure with a recess at the top of the groove, a latch having a head fitting loosely in the recess, the main portion of the latch fitting in the groove, a d having a catch at its lower end to engage the trap,

a sleeve slidably mounted on the outside of the bucket structure, with means to guide and restrict the movement olsaid sleeve, the

sleeve in its lowest position engaging the back of the latch to hold the trao'iocked and in its upper position allowing outward move ment of the latch,

6. A well cementing bucket, as claimed in claim .5, the sleeve having an elongated slot in one side adjacent the'latch to allow out; ward swinging of the latch into said slot in the upper position or" the sleeve; 7

"T. A well cementing bucket comprising in combination a tubular bucket structure hav ing a pivotally mounted trap atits lower end, the bucket structure havinga groove in" one side with a recess at theupper end of the groove, a latch havlng a head, the head loosely fitting in the recess and the" main portion of the latch in the groove, the latch having a catch at its lower end to engage the trap, a sleeve having a plurality of opposite slots, pins extending through said slots and connected to the bucketstructure to guide and limit the sliding movement of the sleeve, the sleeve in its lowest position engaging the back of the latch whereby the trap may held locked, there being an elongatedslot adjacent the latch to allow outward swinging thereofwith the sleeve in the upper position 7 to allow release of the trap by the latch.

8. A well cementing bucket, as claimed in claim 7, the latch having a curved nose structure, and the trap having a camn'ied surface engaging such nose structure whereby on release of the back of the atch by the up ward movement of the sleeve the trap is forced downwardly by the weight of ma-- terial thereon. v V In testimony whereol' l havesigned my name to this specification.

ARTHUR n. JUHNSON. f 

